LPI 305-300 Exam With Confidence Using Practice Dumps

The output of xl list shows the state of the domains. The domain with ID 6, Ubuntu, has a state of “b—”. This means that the domain is blocked, which means it is idle or waiting for I/O.

The command lxc-attach is used to execute a command in a running LXC container. It allows the user to start a process inside the container and attach to its standard input, output, and error streams1. For example, the command lxc-attach -n mycontainer -- ls -lh /home will list all the files and directories in the /home directory of the container named mycontainer1. The other options are not valid LXC commands. The command lxc-batch does not exist. The command lxc-run is an alias for lxc-start, which is used to start a container, not to execute a command in it2. The command lxc-enter is also an alias for lxc-attach, but it is deprecated and should not be used3. The command lxc-eval is also not a valid LXC command. References:

• 1: Executing a command inside a running LXC - Unix & Linux Stack Exchange.
• 2: lxc-start: start a container. - SysTutorials.
• 3: lxc-attach: start a process inside a running container. - SysTutorials.

The unshare command is used to run a process in a new Linux namespace12. It takes one or more flags to specify which namespaces to create or unshare from the parent process1. For example, to run a shell in a new mount, network, and PID namespace, one can use:

unshare -mnp /bin/bash

References:

• 1: unshare(1) - Linux manual page - man7.org
• 2: A gentle introduction to namespaces in Linux - Packagecloud